Water-tube steam-generator.



J. H. RO SEN THAL' 8a; A. SPYEE. WATER TUBE STEAM GENERATOR I APPLICATION FILED FEBJB, 1909. 7 959,612. Patented May 31,1910.

3 SHEETS-SHEET 1.

ATTORNEYS J H. ROSENTHAL & A. SPYER.'

WATERS TUBE STEAM GENERATOR.

APPLIOATION FILED FEBJG, 1909.

Patented May 31, 1910.

3SEEETS-SHEET 2.

O O O0 000 O0 WITNESSES A T,TOHNEYS J. H. ROSENTHAL & A. SPYER. 7

WATER TUBE STEAM GENERATOR.

APPLICATION FILED FEBJG, 1909.

Patented May 31, 1910.

3 SHEETS-SHEET 3 IN l/E N T0173 4 TTOIMEVS WITNESSES WCW W ""THAL and ARTHUR. SrYnn, both subjects of .the King of. Great Britain, and residents of as ets.

unis an snares Parser er sion.

James H. aosEN'rHAL Ann ARTHUR spree, or Lennon, snerazun. assreuoas ro arr-IE raccoon & WILCOX COMPANY, or BAYONNE, newauassr, a conronnrron or NEW JnasEY.

Specification of Letters Patent.

WATER-TUBE STEAM-GENERATOR.

i Application filed February 16, 1909. erial No. $8,288.

To allwhom 'itmogcomem:

Be it known that we, JAMES H. Rosen- Oriel House, Farringdon street, London, En land, have invented certain new and usetul Improvements in Water-Tube Steam- Generators, of which the following is a specification.

This invention relates to a water tube steam generator of the Babcockt Wilcox type and-has for its object certain mod1fica tlons in .the. construction and arrangement of'parts 'as hereinafterdescribed. In general it maybe stated that at one end of a single bank'of'tubes in a single ended boiler,

and at the outer ends in a double ended boiler, we retainthe system of headers associated With that type of generator, and sub- 7 part of the boiler in the latter case. A boiler stanti'al saving in weight.

stitute a drum at the opposite end of the bank in the former case and at the central so constructed is adapted to be fired either in a direction parallel to the axes of the tubes or in a direction transverse to the axes or thetubes. Additionally in the case of the'double ended boiler, there is a sub- In the accompanying drawings, wherein, by way of illustrat on, we have shown certain embodiments of our invention, Figure 1 1s a longitudinal, sectlonal, view through a double-endedbmler, and showing the furnaoes located so as to be fired in. a direction transversely of the axes of the tubes; F 1g.

Ellis. a similar View, but showing the "furnaces located to be fired in a direction parallel to the axes of the tubes; Fig. 3 is a longitudinal sectional view of a single-ended form of generator, as d stinguished from the doubleended forms shown in Figs. 1 and 2; Fig. l

, is a detail sectional view and side elevation showing the watertubes as connected to spacing; Fig; o

a zigzag, sinuous or staggered spacing of the steppechend headers, as distinguished from inclined headers shown in Figs. 1 3;'Fig. 5 shows headers suitable for straight tube shows headers inclined for tubes; Fig. 7 is a sectional view showing the employment of drums in the place of headers. I H

Referring now especiallyfto Figs. 1 and 2 of the drawings, the improved generator comprises the steam drum A, the bottom water drum B, the two sets of end headers trally of the boiler, the banks of water-circulating tubes 1) and D respectively, extending to the headers on each side. Under each of the pairs of banks of tubes a furnace F (Fig. 1) is located, and in the instance shown in Fig. 1, these furnaces are arranged to be fired transversely to the axes of the tubes through the firing doors F on either or both sides.

In Fig. 2 the furnaces F beneath the, banks of tubes are arranged to be fired longitudinally of the axes of the tubes through the firingf doors F at each end of the boiler. The products of combustion in the furnaces illustrated are caused to pass over the whole of the heating surfaces.

. In the arrangement of baflling' shown in Figs. 1 and 2 a short, longitudinal baiile H is arranged'above and parallel with each of the lower bank of tubes, the products of combustion passing such lower set through the space Gr between the lower and upper banks of tubes, thencevertically across the upper bank of tubes, being directed by the vertical baiiie l and a longitudinal battle J, the gases thence making a transverse pass directed by the baflie K, such gases thence passing adjacent, to'the steam drum and out through the uptake L. The baliiing arrangement may be of any suitable and desired character and the up-take L may be arranged as shown, that is to say, in proximity to the steam. drum, or it may be ar- Patented sta at, rate.

ranged at either end of the generator as V may be found conven ent.

The s ace between the upper and lower banks 0 tubes, which we have indicated by the letter may be employed for inserting a feed water heater or superheater M, as is shown in Fig. 2.

In Fig. 3 we have shown a modified arrangement of steam generator, in this case the boiler being single-ended and formed header into'which the tubes are expanded,

said header being indicated byithe reference character G In Fig. 5 we have shown headers formed for straight tube spacing, such headers being indicated by the character C and in Fig. 6, 0 indicates the headers adapted to be employed for zigzag spacing of the tubes.

. In Fig. 7 we have shown still further our construction of boiler. water drum- B, suitably supported by the wall N, is connected with drums O, which we employ in the place of the headers shown in Figs. 1, 2 and 3. The lower banks of tubes P, are curved instead of being straight, as shown in the views heretofore described, and similarly, the upper banks of tubes Q, which connect the drums O with the steam drum A, are also curved. In

I Fig. 7. the drum A is connected with the water drum B through the down-comers E.

From the above description taken in connection with the accompanying drawings, the operation of the generator will be-readily apparent. The steam drum and the bottom 1 water drum being connected together by down-comer tubes, the direction of flow of the circulation is first upward through the lower bank of tubes into the headers or drums used in lieu of the headers, then upward through the headers or drums, then up through the upper bank of tubes. The mixture of steam and water is then delivered tothe steam drum, whence by suitable means the steam is passed away into steam pipes, the water passing down the down-comer tubes and thence into the lower water drum.

Owing to the relatively great height of the furnace front available, the boiler is especially suitable for the adaptation of oil fuel, there being ample space for the insertion of the burners which would be required.

It will be noted that we have provided an apparatus wherein the boilers may be fired either in the direction parallel to the axes of the tubes or in a direction transverse to the axes of the tubes. It will further be seen that we may employ any of'the well known types of headers, or, in lieu thereof, we may use drums as shown in Fig. 7,- or, if desired,

we may. employ a fiat water leg, suitably ed, as may be deemed necessary.

In this case the 1 and 2 it will be seen that the tubes are pitched closer together in a vertical plane in the steam drum and in the bottom water drum than they are in the headers, the thickness of the tube plates allowing for this and the holes in the tube plates being counterbored, as required to suit'the angle of inclination of the tubes.

The circulation of'the boiler is designed so as to give an especiallyample water supply, to the lower rows of tubes, because the water supply required for the upper banks of tubes is obliged to pass through the lower or fire box bank of tubes, thereby insuring an ex ceptionally rapid circulation in these latter tubes and enablin the boiler to be pressed to a higher rate oi evaporation.

When the boiler is fired' parallel to the axes of the tubes all the tubes can be drawn into the stoke hole and each tube examined independently by removing the hand hole fittings in the headers,. if this be required. At the same time the whole of the tubes can be examined by simply removing the-manhole door ofi' the steam drum, and the manhole door off the water drum, this removal of the two doors renderin the whole of the in terior of the boiler visible. A hand-hole fitting may also be placed at the top ofeach header so that by dropping, a light down the header, the tubes can be made visible throughout their entire length from the drum without removing the header handhole fittings.

While we have herein shown and described one embodiment of our invention, we wish it to be understood that we do not limit ourselves to the particular embodiment herein set forth, but that modification and variation may be made without departing from the spirit of our invention or exceeding the scope of our claims.

Having thus described our invention,

what we claim as new and desire to secure I, by Letters Patent is 1. A water tube boiler comprising a water drum and a steam and water drum, headers, a bank of tubes extending from opposite sides of the water drum to the lower part of the headers and inclined upwardly, a bank of tubes extending from opposite sides of the steam and water drum to the headers and inclined downwardly, and bafllesin the upper banksof'tubes forming'passes for the products of combustion, the first pass being I i abank seems 'of tubes extending from opposite sides of the steam zmd -Wwnter drum to (he headers and inclined downwardly, said tubes being pitched closer together in a vertical plane in the said lru1ns than they re in the headers, and (,lmvn-emmr tubes cerzneetitu; the said drums.

Ql THAL. R.

.Vitnesses H. P. SMITH, snnnwoen SM! 'ru. 

